Let’s create an invoice using the template that you’ve created, @cboe.
The template that you’ve created should show up when you create a new invoice. If it’s not, what you have is a damaged template.
To resolve it, you can restore the backup file, if you have one, the time that the invoice template has worked.
Check these articles for more information:
Let us know if there’s anything that I can help. I’m always glad to help in any way I can.